含砂层软土地基真空预压二维有限元分析  

Two-Dimensional Finite Element Analysis of Vacuum Preloading of Soft Soil Foundation with Sand Layer

作　　者：谢彬 谢忠武 王晓峰 王龙 徐敏涛 XIE Bin;XIE Zhongwu;WANG Xiaofeng;WANG Long;XU Mintao(Wenzhou Water Conservancy Investment Development Co.,Ltd.,Wenzhou Zhejiang325000,China;Wenzhou Education Infrastructure Center,Wenzhou Zhejiang325000,China;Wenzhou University,Wenzhou Zhejiang325000,China;Zhejiang Province Key Laboratory of Soft Soil Foundation and Reclamation Engineering Technology of Seawall,Wenzhou Zhejiang325000,China;Zhejiang Province Haitu Reclamation and Its Ecological Protection Collaborative Innovation Center,Wenzhou Zhejiang325000,China;Coastal Soft Soil Foundation Disaster Prevention and Mitigation Technology Zhejiang Engineering Research Center,Wenzhou Zhejiang325000,China;Ultra-Soft Soil Engineering Technology and Intelligent Monitoring Zhejiang International Science and Technology Cooperation Base,Wenzhou Zhejiang325000,China)

机构地区：[1]温州市水利投资开发有限公司,浙江温州325000 [2]温州市教育基建中心,浙江温州325000 [3]温州大学,浙江温州325000 [4]浙江省软弱土地基与海涂围垦工程技术重点实验室,浙江温州325000 [5]浙江省海涂围垦及其生态保护协同创新中心,浙江温州325000 [6]滨海软土地基防灾减灾技术浙江省工程研究中心,浙江温州325000 [7]超软土工程技术与智能化监测浙江省国际科技合作基地,浙江温州325000

出　　处：《北方建筑》2024年第4期69-76,共8页Northern Architecture

摘　　要：采用真空预压处理含砂层软土地基时,受现场试验环境的限制,无法定量分析含砂层会对地基形变产生的影响。以温州某围海工程为例,针对粉砂含淤泥、淤泥等物理力学性质差异明显的土样,通过有限元模型对真空预压加固过程进行数值模拟计算。将模拟分析结果与现场实测数据进行对比分析,明确了含砂层对软土地基排水的促进作用,揭示了在砂层厚度不变的条件下,含砂层埋设深度越深,软土地基的分层沉降及侧向位移越大的规律。研究验证了有限元模型的合理性,可为真空预压技术处理类似地质条件提供有效参考。When vacuum preloading is applied to treat soft soil foundations with sandy layers,quantitative analysis of the influence of the sandy layers on foundation deformation is constrained by the limitations of on-site experimental conditions.Taking a coastal engineering project in Wenzhou as an example,finite element modeling was utilized to numerically simulate the vacuum preloading reinforcement process for soil samples exhibiting significant differences in physical and mechanical properties,such as fine sand with silt and silt.The simulation analysis results were compared with on-site measured data,elucidating the facilitating role of sandy layers in promoting drainage in soft soil foundations,it revealed that under the condition of constant sand layer thickness,the deeper the burial depth of the sandy layer,the greater the stratified settlement and lateral displacement of the soft soil foundation.The study validated the rationality of the finite element model,providing valuable insights for the application of vacuum preloading technology similar geological conditions.

关 键 词：含砂层 真空预压 有限元分析 现场试验 

分 类 号：TU470.3[建筑科学—结构工程]